1 /* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger.
2 Copyright 1988, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include <sys/types.h>
25 #include <sys/param.h>
31 #ifndef USER /* added to support BCS ptrace_user */
32 #define USER ptrace_user
34 #include <sys/ioctl.h>
44 #include <sys/ptrace.h>
46 /* define offsets to the pc instruction offsets in ptrace_user struct */
47 #define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u)
48 #define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u)
49 #define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u)
51 /* define offsets to the pc instruction offsets in ptrace_user struct */
52 #define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u)
53 #define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u)
54 #define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u)
57 extern int have_symbol_file_p();
59 extern jmp_buf stack_jmp;
62 extern char registers[REGISTER_BYTES];
65 fetch_inferior_registers (regno)
66 int regno; /* Original value discarded */
68 register unsigned int regaddr;
69 char buf[MAX_REGISTER_RAW_SIZE];
75 offset = (char *) &u.pt_r0 - (char *) &u;
76 regaddr = offset; /* byte offset to r0;*/
78 /* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */
79 for (regno = 0; regno < NUM_REGS; regno++)
81 /*regaddr = register_addr (regno, offset);*/
84 for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
86 *(int *) &buf[i] = ptrace (3, inferior_pid,
87 (PTRACE_ARG3_TYPE) regaddr, 0);
88 regaddr += sizeof (int);
90 supply_register (regno, buf);
92 /* now load up registers 36 - 38; special pc registers */
93 *(int *) &buf[0] = ptrace (3,inferior_pid,
94 (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0);
95 supply_register (SXIP_REGNUM, buf);
96 *(int *) &buf[0] = ptrace (3, inferior_pid,
97 (PTRACE_ARG3_TYPE) SNIP_OFFSET,0);
98 supply_register (SNIP_REGNUM, buf);
99 *(int *) &buf[0] = ptrace (3, inferior_pid,
100 (PTRACE_ARG3_TYPE) SFIP_OFFSET,0);
101 supply_register (SFIP_REGNUM, buf);
104 /* Store our register values back into the inferior.
105 If REGNO is -1, do this for all registers.
106 Otherwise, REGNO specifies which register (so we can save time). */
109 store_inferior_registers (regno)
112 register unsigned int regaddr;
118 unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
124 /* regaddr = register_addr (regno, offset); */
125 if (regno < PC_REGNUM)
127 regaddr = offset + regno * sizeof (int);
129 ptrace (6, inferior_pid,
130 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
133 sprintf (buf, "writing register number %d", regno);
134 perror_with_name (buf);
137 else if (regno == SXIP_REGNUM)
138 ptrace (6, inferior_pid,
139 (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno));
140 else if (regno == SNIP_REGNUM)
141 ptrace (6, inferior_pid,
142 (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno));
143 else if (regno == SFIP_REGNUM)
144 ptrace (6, inferior_pid,
145 (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno));
146 else printf ("Bad register number for store_inferior routine\n");
149 for (regno = 0; regno < NUM_REGS - 3; regno++)
151 /* regaddr = register_addr (regno, offset); */
153 regaddr = offset + regno * sizeof (int);
154 ptrace (6, inferior_pid,
155 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
158 sprintf (buf, "writing register number %d", regno);
159 perror_with_name (buf);
162 ptrace (6,inferior_pid,
163 (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM));
164 ptrace (6,inferior_pid,
165 (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM));
166 ptrace (6,inferior_pid,
167 (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM));
174 /* blockend is the address of the end of the user structure */
175 m88k_register_u_addr (blockend, regnum)
178 int ustart = blockend - sizeof (struct USER);
212 case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
213 case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
214 case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
215 case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
216 case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
217 case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
218 case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
219 default: return (blockend + sizeof (REGISTER_TYPE) * regnum);
225 #include <sys/procfs.h>
227 /* Given a pointer to a general register set in /proc format (gregset_t *),
228 unpack the register contents and supply them as gdb's idea of the current
232 supply_gregset (gregsetp)
236 register greg_t *regp = (greg_t *) gregsetp;
238 for (regi=0; regi <= SP_REGNUM; regi++)
239 supply_register (regi, (char *) (regp + regi));
241 supply_register (SXIP_REGNUM, (char *) (regp + R_XIP));
242 supply_register (SNIP_REGNUM, (char *) (regp + R_NIP));
243 supply_register (SFIP_REGNUM, (char *) (regp + R_FIP));
244 supply_register (PSR_REGNUM, (char *) (regp + R_PSR));
245 supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR));
246 supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR));
250 fill_gregset (gregsetp, regno)
255 register greg_t *regp = (greg_t *) gregsetp;
256 extern char registers[];
258 for (regi = 0 ; regi < R_R31 ; regi++)
259 if ((regno == -1) || (regno == regi))
260 *(regp + regi) = *(int *) ®isters[REGISTER_BYTE(regi)];
262 if ((regno == -1) || (regno == SXIP_REGNUM))
263 *(regp + R_XIP) = *(int *) ®isters[REGISTER_BYTE(SXIP_REGNUM)];
264 if ((regno == -1) || (regno == SNIP_REGNUM))
265 *(regp + R_NIP) = *(int *) ®isters[REGISTER_BYTE(SNIP_REGNUM)];
266 if ((regno == -1) || (regno == SFIP_REGNUM))
267 *(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE(PSR_REGNUM)];
268 if ((regno == -1) || (regno == PSR_REGNUM))
269 *(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE(PSR_REGNUM)];
270 if ((regno == -1) || (regno == FPSR_REGNUM))
271 *(regp + R_FPSR) = *(int *) ®isters[REGISTER_BYTE(FPSR_REGNUM)];
272 if ((regno == -1) || (regno == FPCR_REGNUM))
273 *(regp + R_FPCR) = *(int *) ®isters[REGISTER_BYTE(FPCR_REGNUM)];
276 #endif /* USE_PROC_FS */